One other factor that I forgot to mention is the suspension setup. I have eibach lowering springs, AGX adjustable struts, GMPP sway bars front and back, trailing arms, shortened dogbones. Now, it is true that I may experience trouble driving through deep snow due to less clearance, but the GP being lowered does help significantly in the handling. With the winter tires on, and I have reduced air pressure when the road surface is covered in ice and snow, the car sticks to the road so much better. So much so that I have never had the back end swing out in slippery conditions. In fact, on back roads or in parking lots where there is no danger of hitting anything, I will get the car moving to 25-30 mph and turn the steering wheel sharply to the left or right to get into a slide, and the car will not do it easily, unless I pick up the speed more and really throw it into a turn, then it will slide.
Compare the lowered stance to any vehicle that is normal height and I bet any car that is lowered will not slide out of control as easily.
Again, I have been warned that running the GP in the winter on lowering springs can be trouble if there is deep snow, as it is easy to cause damage to the front bumper and the underbody by hitting clumps of frozen snow and ice on the road as well as other hazards like rocks (I hit a good size rock once that a plow truck had pushed out in a parking lot, and was covered up and I did not see it, and I was driving a non lowered GP at that time. Hitting the rock caused an oil leak)
And, of course, reducing the psi in each tire lowers the car even more (the mud flaps are almost touching the road surface), so I have to be extra careful that I don't hit anything.
But I have had positive results driving in snow/ice conditions, at least I have not had an accident yet.
